Diazosalt preparations for dyeing and printing



Patented 1529..

UNITED STA S PATENT OFFICE;

mpmzmnn 'KELIDER AND KARL scnnrrzsrann', or orrENBAon-oN-rnn-mm ennmm,assrenons TO eaassrzmr nms'rcrr conronnrron or m: 1c. 1., a CORPORATIONor DELAWARE. I W 9.

DIAZOBALT rmirana'rrons ron DYEING m5 rnmzrme.

1T0 Drawing. Original application filed December 24, 1925, Serial N 77576 and in Germ o an 19, 1985. Divided and this application filed March24, 1927. Serial No 178132 y January 7 This invention relates to the usefor dyeing and printing of diazosalt preparations comprising neutral1.5-naphth'alenedisulfonic acid diazonium salts of unsulfonated substi-5 tuted aromatic amines, to which under cercording to the character ofthe diazonium bases from which they are made, but is sufficiently goodeven in the case of those which are more difficultly soluble so thatdeep and very useful dyeings are obtained, notably upon materials Whichhave been block printedwith 2.3-hydroxynaphthoic-acid arylids andespecially if the solubility is improved by the admixture of metal saltsof arylsulfonic acids as described in our copending application Ser. No.74,161, filed Dec. 8, 1925.

The 1.5-naphthalenedisulfonates of diazonium bases have the advantageover the 2.7 and 2.6-disulfonates of the German Patent 94,280, grantedJuly 26, 1894, to Fabriques de Produits Chimiques de Thann et deMulhouse, that the 1.5-naphthalenedisulfonic acid metal salts which arenecessary for their productionby mutual transposition from aqueousmineral acid diazosalt solutions prepared in the customary manner-areeasily separated uniformly and that the 1.5-naphthalenedisulfonio aciddiazosalts resulting from the treatment of mineral acid diazosaltsolutions with the metal salts of 1.5-naphthalenedisulfonic acids arecapable of being easily separated in a crystallized or crystalline formfrom their aqueous solutions without any diflicult operation ofconcentration by evaporation and are then easily dried,

eral acid diazosalt solutions. The solubility of the1.5-naphthalenedisulfonates varies ac- The commercial advancerepresented by the new preparations'is due to a number of excellentcharacteristics of the 1.5-naphthalenedisulfonic acid diazonium salts;such as, the capability of being readily separated'in a unlfornr stateand the ability of being easily; 1dlgiledaiihellr properti (if beinsufficiently sole ec earnesso 't esha esth an cll gzheir high stability.ey produci e i'ollowin exam les ar lustrate the invgn-tionz p e glven to11 (1) A mixture of 46 parts of neutral 1.5- naphthalenedisulfonate ofdiazotized o-chloranilin of 28% chloranilinebase content havmg theforniula SOr-N 5 parts of aluminum sulfate and 49 parts of sodium saltof benzenesulfonicacid yields a product of very high stability, which iseasily d ssolved and which is adapted for dyeing directly cotton whichhas been impregnated with a coupling compound. i

(2) The product obtained by mixing '59 parts of neutral1.5-naphthalenedisulfonate of diazotized dianisidine of 34%dianisid-inewith 20 parts of partially dehydrated alumil at 3540 O. andyields an aqueoussolution which is directly useful for dyeing. Coppersalts or other salts may also product.

This application is a division of our application filed December 24,1925, Serial No. 77,576. V y

We claim:

e added to the 1. In a process of dyeing, the step which 7 comprisestreating a textile material, impreg nated with a coupling compound, witha neutral 1.5-na hthalenedisulfonic acid diazonium salt 0 anunsulfonated mbstituted aromatic amine.

2. In a process of dyeing, the step which comprises treating a textilematerial, impregnated with a 2.3-hydroxynaphthoic acid arylid, with aneutral 1.5-naphthalenedisulfonic acid diazonium salt of an unsulfonatedsubstituted aromatic amine.

3. In a process of dyeing, the step which comprises treating a textilematerial, impregnated with a coupling compound, with an aqueous solutioncomprising a neutral 1.5- naphthalenedisulfonic acid diazonium salt ofan unsulfonated substitutedaromatic amine, and a metal salt of an arylsulfonic acid;

4. A textilematerial impregnated with a coupling compound treated with aneutral 1.5-naphthalenedisulfonic acid diazonium salt of an unsulfonatedsubstitutedaromatic amine.

5. A textile material impregnated with a 2.3-hydroxynaphthoic acidarylid, treated with a neutral 1.5-naphthalenedisulf0nic acid diazoniumsalt of an unsulfonated substituted aromatic amine.

' -In testimony whereof, We affix our signatures, FERDINAND KELLER.

. KARL SCHNITZSPAHN.

